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Texas Instruments INA159AIDGKT
- Part No.:
- INA159AIDGKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA159AIDGKT.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,725
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Product details
Overview
INA159AIDGKT from Texas Instruments is a precision G = 0.2 difference amplifier optimized for ±10V differential signal conditioning into single-supply ADCs, featuring ±100µV offset voltage, ±1.5µV/°C drift, and 1.5MHz bandwidth. It integrates laser-trimmed resistors for 0.024% max gain error and supports rail-to-rail input common-mode range beyond supply rails.
For engineers reviewing the INA159AIDGKT datasheet, INA159AIDGKT pinout, INA159AIDGKT application, or INA159AIDGKT equivalent, this page delivers verified specifications, MSOP-8 pin mapping, industrial process control use cases, and two validated alternative parts with documented functional trade-offs.
Technical Context
The INA159AIDGKT implements a fixed-gain (0.2) difference amplifier using a precision op amp with on-chip, laser-trimmed resistor network (20kΩ/100kΩ/40kΩ ratios), eliminating external precision resistors. Its input stage supports rail-to-rail common-mode voltage operation up to ±17.5V at V+ = 5V, enabling direct interfacing of ±10V industrial signals.
It features dual reference inputs (REF1, REF2) for flexible mid-supply biasing and includes SENSE pin for output monitoring. The device operates from +1.8V to +5.5V single supply or ±2.75V split supply, with 15V/µs slew rate and 0.01% settling in 1µs under 100pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 0.2 (G = 1/5); translates ±10V differential input to 0–4.096V single-ended output compatible with 5V-referenced ADCs like ADS8325. |
| Gain Accuracy | ±0.024% max over −40°C to +125°C; ensures <±1mV absolute error in 4.096V full-scale output for high-resolution data acquisition. |
| Input Offset Voltage | ±100µV max at 25°C; contributes <±0.2mV output error before gain, critical for sub-12-bit system accuracy. |
| Offset Drift | ±1.5µV/°C; limits temperature-induced output shift to <±0.15mV across 100°C industrial range. |
| Bandwidth | 1.5MHz (−3dB); supports accurate digitization of signals up to ~100kHz with <0.1% gain error. |
| Slew Rate | 15V/µs; enables clean 4V step response in <1µs with 100pF load, suitable for medium-speed ADC sampling. |
| Supply Range | +1.8V to +5.5V single supply; allows operation from low-power 1.8V systems up to standard 5V industrial rails. |
| Common-Mode Range | Up to ±17.5V at V+ = 5V (REF pins tied); accommodates overvoltage-tolerant sensor interfaces without external attenuation. |
Pinout & Package
VSSOP-8 (DGK) package: 3.0mm × 3.0mm body, 1.1mm max height, 0.65mm lead pitch, exposed thermal pad (non-electrical). RoHS-compliant, MSL Level-1, rated for −40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF1 | Reference Input 1 | Connects to ground or reference voltage to configure internal resistor divider bias point; sets common-mode output level. |
| 2 - −IN | Inverting Input | Differential input terminal; accepts negative leg of ±10V signal; high common-mode rejection (94dB min). |
| 3 - +IN | Non-inverting Input | Differential input terminal; accepts positive leg of ±10V signal; rail-to-rail input capability extends beyond supply rails. |
| 4 - V− | Negative Supply | Ground or negative rail connection; supports single-supply (0V) or split-supply (e.g., −2.5V) operation. |
| 5 - SENSE | Output Monitor | Provides buffered copy of OUT for feedback or diagnostics; high-impedance node, not intended for loading. |
| 6 - OUT | Analog Output | Single-ended output driving ADC input; swing limited to (V−)+0.048V to (V+)−0.02V at 25°C. |
| 7 - V+ | Positive Supply | Primary power rail; accepts +1.8V to +5.5V; requires local 0.1µF bypass capacitor per layout guidelines. |
| 8 - REF2 | Reference Input 2 | Connects to reference voltage (e.g., 4.096V) to set output scaling; paired with REF1 to define gain and offset. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed resistor network | Enables 0.024% max gain error and 94dB CMRR over temperature without external precision components. |
| Rail-to-rail input common-mode range | Supports ±10V inputs with V+ = 5V and REF pins configured for 2.5V bias, eliminating need for level-shifting circuitry. |
| Low 1.5µV/°C offset drift | Maintains <±0.15mV output error across −40°C to +125°C, critical for uncalibrated industrial sensor front-ends. |
| 15V/µs slew rate & 1µs 0.01% settling | Ensures fidelity for fast transients in motor control feedback or vibration monitoring sampled by medium-speed ADCs. |
| Single-supply operation down to +1.8V | Enables integration into battery-powered or ultra-low-voltage embedded systems while retaining ±10V input tolerance. |
| Exposed thermal pad (VSSOP-8) | Improves thermal resistance (θJA = 150°C/W) for stable performance in compact industrial PCB layouts. |
Applications
| Industrial Process Control | Instrumentation Signal Conditioning |
|---|---|
|
Use Scenario: Isolating and scaling ±10V outputs from 4–20mA loop-powered transmitters feeding PLC analog input modules. IC Role / Device Role / Timing Role: Difference amplifier translating bipolar field signals to unipolar ADC input range while rejecting common-mode noise from long cable runs. Use Value: 94dB CMRR and ±100µV offset ensure <0.01% FS measurement accuracy without calibration across temperature. |
Use Scenario: Conditioning differential outputs from strain-gauge bridges or RTD interfaces prior to 16-bit SAR ADC sampling. IC Role / Device Role / Timing Role: Precision gain-of-0.2 stage providing matched resistor ratio and low drift to preserve bridge linearity and thermal stability. Use Value: Laser-trimmed resistors eliminate external matching errors, reducing BOM count and board area vs discrete solutions. |
| Differential-to-Single-Ended Conversion | Audio Line Receiver |
|
Use Scenario: Converting balanced ±10V audio or control signals from studio equipment into single-ended 0–4.096V range for microcontroller ADCs. IC Role / Device Role / Timing Role: High-bandwidth (1.5MHz), low-noise (30nV/√Hz) difference amplifier preserving signal integrity during conversion. Use Value: 15V/µs slew rate prevents slew-induced distortion on 20kHz audio fundamentals and harmonics. |
Use Scenario: Receiving consumer/pro-audio line-level signals (±2V) into portable devices with 1.8V–3.3V microcontrollers. IC Role / Device Role / Timing Role: Low-voltage-compatible difference amplifier providing gain-of-0.2 and rail-to-rail input to handle signal headroom margins. Use Value: +1.8V minimum supply enables direct interface with modern low-power SoCs without LDO overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar difference amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA149AIDR | Gain = 1, higher offset (±200µV), wider supply (±2.25V to ±18V), no REF/SENSE pins. | Requires external gain-setting resistors for 0.2x scaling; better suited for high-voltage (>±10V) industrial isolation amps. | Select when higher common-mode voltage (>±17.5V) or programmable gain is required; not drop-in for INA159AIDGKT's REF-biased architecture. |
| AD8271ARMZ | Gain = 0.2 fixed, ±200µV offset, ±1.5µV/°C drift, 1.5MHz BW, but only 10V/µs slew rate and no SENSE pin. | Lacks SENSE output and has lower slew rate; less suitable for fast-settling ADC drive in motor control loops. | Choose for cost-sensitive instrumentation where 10V/µs slew suffices and SENSE functionality is unnecessary. |
Compared with INA159AIDGKT, INA149AIDR offers broader supply and common-mode range but requires external resistors and lacks integrated biasing, while AD8271ARMZ matches gain and bandwidth but trades 33% lower slew rate and no SENSE output-making INA159AIDGKT optimal for precision, fast-settling, REF-configurable ±10V signal chains.
Availability
INA159AIDGKT is available at Aetrix Electronics and suitable for industrial process controls, instrumentation signal conditioning, and differential-to-single-ended conversion requiring stable component supply and guaranteed long-term availability.
Supply support for INA159AIDGKT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and digital signal technologies, with decades of expertise in precision signal conditioning ICs.
The INA159 product line was designed specifically for high-accuracy, low-drift interfacing of ±10V industrial sensor and control signals to single-supply data converters in harsh environments.
FAQ
What is the maximum common-mode input voltage for INA159AIDGKT when operating on a +5V single supply?
With V+ = +5V and REF1/REF2 tied together to a 3V reference, the INA159AIDGKT supports a common-mode input range of +15V to −15V. When using the 1/2-reference configuration (REF1 grounded, REF2 = 5V), the range extends to +17.5V to −12.5V-enabling robust interfacing of overvoltage-tolerant industrial sensors without external protection.
Can INA159AIDGKT drive an ADS8325 ADC directly, and what output swing can be expected?
Yes, INA159AIDGKT is explicitly characterized for ADS8325 interface in Figure 3. With V+ = +5V and REF2 = 4.096V, its output swings from (V−)+0.048V to (V+)−0.02V, delivering 0.048V to 4.076V-fully covering the ADS8325's 0–4.096V input range with 20mV margin for rail imperfections and noise headroom.
How does the SENSE pin on INA159AIDGKT differ from the OUT pin, and when should it be used?
The SENSE pin provides a buffered, low-impedance copy of the OUT signal with identical DC and AC characteristics but is not rated for load current. It is intended for feedback monitoring, diagnostic sampling, or cascaded gain stages-never for driving capacitive loads or ADC inputs. Using SENSE instead of OUT for monitoring preserves OUT's drive capability for the primary ADC interface.
What is the impact of supply voltage on gain accuracy for INA159AIDGKT?
INA159AIDGKT exhibits ±20µV/V PSRR, meaning a 100mV supply ripple introduces ≤±2µV input-referred offset error. Since gain error is dominated by resistor matching (±0.024%), supply variation has negligible effect on gain accuracy-only minor impact on offset. This makes it highly stable in noisy industrial power environments.
Is INA159AIDGKT suitable for battery-powered applications with 1.8V supply, and what performance trade-offs occur?
Yes, INA159AIDGKT operates down to +1.8V single supply. At this voltage, quiescent current drops to ~0.9mA (vs 1.1mA at 5V), and output swing compresses to ~0.05V–1.75V, but gain accuracy (±0.024%), offset (±100µV), and CMRR (≥94dB) remain fully specified. Bandwidth reduces slightly to ~1.2MHz, still sufficient for most sensor readout.
INA159AIDGKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 15V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.5 MHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 1.1mA
- Current - Output / Channel:
- 60 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
INA159AIDGKT FAQ
1.How can I place an order for INA159AIDGKT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA159AIDGKT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for INA159AIDGKT reliable?
The price and inventory of INA159AIDGKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA159AIDGKT is usually 5 days.
3.What payment methods are accepted for INA159AIDGKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA159AIDGKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA159AIDGKT?
INA159AIDGKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA159AIDGKT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for INA159AIDGKT?
For technical support, including INA159AIDGKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA159AIDGKT requirements.
6.How does Aetrix verify that INA159AIDGKT is sourced from the original manufacturer or authorized distributors?
All INA159AIDGKT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that INA159AIDGKT meets industry standards.
7.What is the process for return or replacement of INA159AIDGKT?
All INA159AIDGKT units undergo pre-shipment inspection (PSI). If there is an issue with INA159AIDGKT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The INA159AIDGKT part is unused and in its original packaging.
Return procedure for INA159AIDGKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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